code: def test_multidim_list():
      y = [[0, 1, 2, 3, 4, 2]]
      with pytest.raises(AttributeError):
          one_hot(y)
  
file_path: mlxtend/mlxtend/preprocessing/tests/test_onehot.py
imports: import numpy
  import pytest
  from mlxtend.preprocessing import one_hot
label_desc: Use image node_id 4 for calling a global function with example usage: test_multidim_list() without return types